Shoe insoles that heat up on their own? These Smart Shoe Insoles are perfect for anyone who struggles with cold feet. No more USB cords or batteries are required - these insoles use cutting-edge technology to generate and maintain heat. They're also super comfortable, thanks to the gel padding and contoured design. Whether you're hitting the gym or just taking a leisurely walk, these insoles keep your feet cozy all day.

Specifications:
Size: Male model (40-44) 25*8.5*6.2cm, female model (35-39) 23*7.8*5.8cm
Male size : 9.84*3.35*2.44*in / Female size: 9.06*3.07*2.28*in
Item Type: Insoles
Heating range: 21.5cm x 6cm / 8.46* x 2.36*in
Feature: Thermal
Feature: Breathable
Feature: Hard-Wearing 
Feature: Anti-Slippery
Average temperature: 53 degrees

What's in The Box:
1x Self-heating Smart Shoe Insoles